Process for the preparation of silica slurry for particle growth of pyrolytic silica nuclei and silica particles prepared by this process

摘要

The present invention relates to a method for producing silica slurry for particle growth of pyrolytic silica nuclei, which is improved in shape irregularity and size limitation by using tetraethylorthosilicate (hereinafter referred to as 'TEOS') and hydrolysis and condensation polymerization of water. To silica particles prepared by the method. The present manufacturing method includes a step of dissolving the nuclei of the pyrolyzed silica particles produced by the vapor phase method in an alcohol in a basic atmosphere, and a step of reacting TEOS with water. Accordingly, the weight fraction (5 to 10 wt%) can be raised by growing TEOS by hydrolysis and polycondensation reaction with water using pyrolytic silica, which is relatively inexpensive and widely commercialized, as nuclei, It is possible to economically manufacture spherical silica particles having a very uniform and high purity.